Experimental design for applying geophysical methods in investigating the spatial distribution of hard formations in the excavation face of bucket wheel excavators
Journal Title: Górnictwo Odkrywkowe - Year 2018, Vol 0, Issue 4
Abstract
The estimation of hard formations spatial distribution is critical for the planning of the Bucket Wheel Excavator’s (BWE) operation. It can be made by the application of geophysical methods in correlation to drilling data and other geological criteria. The main objective of this work was to design an expert monitoring measurement system, intended to inform in advance the BWE operators for the occurrence of hard rock inclusions or difficult or even non-diggable geological formations. In this framework, numerous technical limitations were taken into consideration, regarding mainly the interference of the measuring device with the metal structure of the bucket wheel and its boom. Moreover, field tests were carried out regarding the operation of the hard rocks detection system, which was installed on a BWE that operated in several locations within the overburden strata of South Field Mine, Ptolemais, Greece. The selection of the measuring excavation face positions was based on specific criteria. Field tests were performed in excavation faces where the hard rock inclusions had been mapped in detail, as well as in others where the locations of the hard formations were unknown. According to the results of these tests, the response of the detection system to the variations of hard rock layers thickness is satisfactory. However, further work is required for improving the rigidity of the detection system, as well as the accuracy of the GPS device that monitors the position of the bucket-wheel in real time.
Authors and Affiliations
Miltiades Triantafyllou, S. Pirtses, L. Myronidis, Christos Roumpos, Fragkiskos Pavloudakis, Theodore Michalakopoulos, George Apostolopoulos, Michael Galetakis, Antonios Vafidis
Keywords
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